RadarOnline: Recording captures ethnic slur by Gibson

The recording purportedly captures an argument between the actor and his ex-girlfriend

It is the third such recording released by the website since Friday

Police are investigating domestic violence allegations against Gibson

(CNN) -- A third audio recording of a bitter argument purportedly between actor Mel Gibson and his ex-girlfriend Oksana Grigorieva was released Tuesday in which the man can be heard using an ethnic slur.

It's the latest profanity-laced soundbite to be released by RadarOnline since Friday. The site claims the male voice is that of the 54-year-old Gibson. CNN has not independently confirmed the authenticity of the recordings.

In Tuesday's recording, the couple argue over a Latino woman who works at both of their houses. The man on the recording grows enraged when the woman insists she wants to keep the worker employed at her house to help care for the couple's 8-month-old daughter.

"I will fire (her) if she's at your house," the man says. "I will make it known and fire her. I'll report her to the f...ing people that take f...ing money from the w....... (referring to illegal immigrants), ok?"

A fourth clip was provided by RadarOnline exclusively to CNN's "Larry King Live" Tuesday night. In that recording, the man can be heard saying he wants to "hurt someone or myself."

"You've done this to me," the man says. "I was never like this. You did it. All right? It's your fault. If something happens be it on your f...ing head.

On Monday, the website released a recording in which the man threatens the woman's life, saying "I'll put you in the f......ing rose garden."

In the recording released Friday, the man launches into a racist, sexist rant against the woman, telling her she looks "like a f...ing b.... on heat and if you get raped by a pack of n...ers it will be your fault."

It's unclear when the recordings were captured.

Grigorieva, 40, has acknowledged that the female voice on the recordings is hers and that the other voice is Gibson's. CNN's efforts to obtain comment from Gibson have been unsuccessful.

The couple have been locked in a custody dispute over their daughter.

Last week, the Malibu Hills Police Department opened an investigation into an alleged domestic violence dispute between Gibson and Grigorieva.

Grigorieva filed a restraining order against Gibson alleging that the actor and director struck her in the face, according to her spokesman, Stephen Jaffe.

The estranged couple are scheduled to appear in court July 20 for a status hearing on the restraining order.

Grigorieva has also spoken with sheriff's deputies and has provided a statement to them in their domestic violence investigation, Jaffe told CNN Friday.

The recordings "will be part of the investigation," Los Angeles County Sheriff's spokesman Steve Whitmore said on Monday.

It is not known how RadarOnline obtained the recordings. Jaffe said Friday that the site did not receive them from Grigorieva.

She "absolutely did not provide any tape to the media," he said.

Meanwhile, some show business personalities appeared to distance themselves from Gibson this week.

Longtime friend and former "Maverick" co-star Jodie Foster and Danny Glover, Gibson's co-star in the popular "Lethal Weapon" film series, declined to comment on the allegations, according to the Los Angeles Times.

An attorney for Gibson's ex-wife, Robyn, told CNN Tuesday that she would also not be commenting on the recordings.

But at least one Hollywood star was defending the embattled actor.

"I don't like what he did here, but I know Mel and I know he's not a racist," TV host Whoopi Goldberg said on ABC's "The View" Tuesday. "You can say he's being a bone head but I can't sit and say that he's a racist, having spent time with him in my house with my kids. I can't say it."

Gibson came under fire for a racially charged tirade in 2006, when he admitted to making anti-Semitic remarks during a drunken driving arrest. He issued an apology at the time, and appealed to the Jewish community to help him recover from his alcohol addiction.